DESCRIPTION OP THE SPECIES. 285 



ish-brown within the stigma ; the hyaline drops, appearing in a 

 different light whitish, and which perforate the brown coloring^ 

 are generally large, but not numerous ; the stigma contains but 

 a single yellowish drop ; its extreme basis also has a narrow hya- 

 line border ; the triangular cluster of larger drops which occurs 

 on the anterior margin, immediately beyond the stigma, consists 

 here of five drops, absolutely separated from each other; the end 

 of the marginal cell contains but a single small drop ; a larger 

 drop occurs below the end of- the second longitudinal vein and a 

 similar one under it, in the first posterior cell ; between these two 

 drops and the apex of the wing there are four smaller drops, 

 forming a somewhat arcuated crossband ; especially characteristic 

 for the species are three conspicuous drops in the second and four 

 similar ones in the third posterior cell, between which the brown 

 coloring is so pale or faded, that they appear almost coalescent ; 

 (this is not well expressed in the figure, which is kept altogether 

 in too dark a shade) ; upon the middle of the discal cell there is 

 a large drop, occupying its whole breadth. The third longitudi- 

 nal vein is distinctly bristly about as far as the small crossvein ; 

 this crossvein corresponds to the last third of the discal cell ; the 

 posterior crossvein is straight and very perpendicular. 



Hob. Distr. Columbia (Osten-Sacken). 



Observation. In several respects this species resembles the 

 European species of Carphotricha ; but, on account of the strik- 

 ing breadth of the forehead, the unusual length of the antennae, 

 and the comparatively very even face, somewhat retreating below, 

 it cannot well be placed in that genus, especially when T. culta 

 Wied. is admitted in it, on account of its rather close relationship 

 to Carpotricha pupillata Fall. As I know of no other species 

 with which the present one could be generically united, I prefer 

 to establish a separate genus for it, which I call Acidogona. 



36. T. alba Lw. $ <? . (Tab. XI, f. 11.) Albida, alis concoloribus 

 immaculatis, capite, pleuris, scutello segmentorumque abdominalium 

 singulorum margine postico pallide sulphureis, antenuis, terebra, pedi- 

 busqne luteis. 



Whitish, with whitish, altogether immaculate wings ; head, pleurae, scn- 

 tellum, and the posterior margin of the single abdominal segments, 

 sulphur-yellow ; antennae, ovipositor, and feet clay -yellow. Long. corp. 

 % 0.13, 9 cum terebra 0.17 ; long. al. 0.150.16. 



